Any ability that refers to a creature type without specifying that it needs to be a creature can use non-creature tribal permanents with that creature type. For example you can also grab Merrow Commerce with Seahunter.

January 29, 2018
6:58 p.m.

Also, just in case it ever matters, Merrow Commerce will get +1/+1 counters if you use Kumena's third ability, but since it's not a creature, they will largely be irrelevant, but should be tracked just in case your opponents play a Thief of Blood, Daghatar the Adamant, Opalescence or some other similar card.

January 29, 2018
11:49 p.m.

January 30, 2018
12:15 a.m.

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